JP2020059096A - Weld bead cutting device - Google Patents

Abstract

To provide a weld bead cutting device capable of reducing workload for removing a weld bead of a rectangular steel tube while simplifying and downsizing the structure of the device.SOLUTION: There is provided a weld bead cutting device 1 cutting a weld bead 51 of a butting weld part in a rectangular steel tube 50. The cutting device comprises: a horizontal guide 44 placed on the rectangular steel tube 50; a movable body 12 movable along the horizontal guide 44; a base 10 moving integrally with the movable body 12; and a cutting blade 20 installed to the base 10 to cut the weld bead 51 by rotation drive. The device cuts the weld bead 51 by the cutting blade 20 while moving the movable body 12 and the base 10 integrating the movable body along the horizontal guide 44 in such a state as pinching one side of the rectangular steel tube 50 between the horizontal guide 44 and the cutting blade 20.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a welding bead cutting device for cutting a welding bead of a butt welding portion of a rectangular steel pipe.

  BACKGROUND ART In a building, a steel frame structure using steel members as a main structure is known. A column in which square steel pipes are joined together is used for the steel frame structure. FIG. 15 is a perspective view showing a state before joining the square steel pipes 50 to each other. Insert the backing metal 54 into the lower rectangular steel pipe 50, weld the backing metal 54 to the lower rectangular steel pipe 50, insert the upper rectangular steel pipe 50 into the extension of the backing metal 54, and The rectangular steel pipes 50 are connected to each other. FIG. 16 shows a cross-sectional view of a state in which the upper and lower rectangular steel pipes 50 are connected to each other. In the state shown in this figure, a plate-like diaphragm 55 is attached to the groove formed by the chamfered portion 53 of the rectangular steel pipe 50. By welding the groove portions, the diaphragm 55 is joined to the pillar joining the rectangular steel pipes 50 to each other.

  On the other hand, the rectangular steel pipe 50 is formed by press-forming a steel material and joining the abutting portions by welding. Therefore, as shown in FIG. 15, a convex weld bead 51 is formed at the butt portion of the rectangular steel pipe 50. When the weld bead 51 remains, the backing metal 54 cannot be fitted along the inner peripheral surface of the rectangular steel pipe 50, so that it is necessary to remove a part of the weld bead 51. Since a great deal of labor is required if this work is performed manually, Patent Document 1 proposes a cutting device that automatically removes the welding bead 51.

JP, 2008-93758, A

  However, in the cutting device described in Patent Document 1, in addition to a cutter that cuts a weld bead, a mounting table that supports a work (square steel pipe), a fixing means that clamps and fixes the work, and an end position in the longitudinal direction of the work is regulated. Positioning means, moving means for moving the cutter in three directions, inner surface detecting means for detecting an inner peripheral surface of one side of the work close to the welding bead portion, and drive control for driving and controlling the moving means by a detection signal of the inner surface detecting means. Since the apparatus is equipped with a means, the apparatus is complicated and large-scaled, and the welding bead removing operation can be omitted by hand, it is not easy to handle.

  The present invention is to solve the above-mentioned conventional problems, and to provide a welding bead cutting device that has a simple structure and can be downsized while reducing the work load of removing the welding beads of a rectangular steel pipe. With the goal.

  In order to achieve the above object, a welding bead cutting device of the present invention is a welding bead cutting device for cutting a welding bead of a butt weld part of a rectangular steel pipe, and a horizontal guide placed on the rectangular steel pipe, A movable body that can move along a horizontal guide, a base that moves integrally with the movable body, a cutting blade that is attached to the base and that is rotationally driven to cut the welding bead, the horizontal guide, and the While cutting one side of the rectangular steel pipe between the cutting blade and the cutting blade, while moving the movable body and the base integrated with this along the horizontal guide, cutting the welding bead with the cutting blade. Characterize.

  Since the main part of the welding bead cutting device of the present invention is composed of the base to which the horizontal guide and the accessory such as the cutting blade are attached, the structure is simple and the size and weight can be reduced. Therefore, it is easy to carry, the work of attaching and detaching the square steel pipe is facilitated, and the handling during the work is facilitated, so that the work load is reduced.

  Even if the rectangular steel pipe is deformed, the moving body and the base that is integrated with it move horizontally along the horizontal guide that is kept horizontal, so the cutting blade also moves horizontally along with the base. The surface becomes a horizontal plane. Therefore, the inner peripheral surface of the rectangular steel pipe is cut by the cutting blade without excess or deficiency, and it is possible to prevent excessive cutting or uncut residue. Further, the square steel pipe usually has a bead on the upper side at the time of delivery, and the welding bead cutting device according to the present invention can work with the bead on the upper side, so that the work of reversing the square steel pipe is omitted. be able to.

  In the weld bead cutting device of the present invention, it is preferable that the cutting blade is positionally adjustable in the vertical direction, and the base is preferably positionally adjustable in the front-back direction. According to these configurations, the degree of freedom of the setting position of the cutting blade is increased, and more accurate cutting is possible.

  The effects of the present invention are as described above. In summary, the structure is simple and the size and weight can be reduced, the portability is facilitated, and the work for attaching and detaching the square steel pipe is facilitated. Since the handling at the time is easy, the work load is reduced, and even if the rectangular steel pipe is deformed, the cutting surface becomes a horizontal surface and the inner peripheral surface of the rectangular steel pipe is cut by the cutting blade without excess or deficiency. It can be prevented from being left behind, and in addition, the work of reversing the rectangular steel pipe can be omitted.

The perspective view of the state where the welding bead cutting device concerning one embodiment of the present invention was attached to the square steel pipe. The enlarged front view of the welding bead cutting device shown in FIG. The perspective view which looked at the state of FIG. 1 from the back side. The perspective view which looked at the state of FIG. 1 from the side surface side. Sectional drawing in the AA line of FIG. In one embodiment of the present invention, a front view showing before and after work by a welding bead cutting device. In one embodiment of the present invention, a sectional view of a square steel pipe before a welding bead is removed. In one embodiment of the present invention, a sectional view of a square steel pipe after a weld bead is removed. In one embodiment of the present invention, a perspective view of a square steel pipe after a welding bead is removed. The front view of the welding bead cutting device which concerns on one Embodiment of this invention. The side view of the welding bead cutting device which concerns on another embodiment of this invention. The top view of the welding bead cutting device shown in FIG. Sectional drawing in line DD of FIG. The C arrow line view of FIG. The perspective view which shows the state before joining of square steel pipes. Sectional drawing of the state which connected the upper and lower square steel pipes.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a welding bead cutting device 1 according to an embodiment of the present invention is attached to a square steel pipe 50. The rectangular steel pipe 50 is shown with the front side cut away, and the welding bead cutting device 1 is attached to the back side (end). The rectangular steel pipe 50 is used for a steel frame structure, is made by press-forming a steel material, and joins the abutting portions by welding, and a convex weld bead 51 is formed at the abutting portion. The weld bead cutting device 1 is a device that removes the weld bead 51 by cutting a part of a certain range from the end.

  2 is an enlarged front view of the welding bead cutting device 1 shown in FIG. 1, FIG. 3 is a perspective view of the state of FIG. 1 seen from the rear side, and FIG. 4 is a state of the FIG. 1 seen from the side. FIG. 5 is a perspective view as seen, and FIG. 5 is a cross-sectional view taken along the line AA in FIG. 1. Hereinafter, the structure of the weld bead cutting device 1 will be described with reference to FIGS.

  As shown in FIG. 2, rollers 2 and 3 are attached to the base 10. Specifically, the rollers 2 and 3 are supported by the standing portions 4 and 5 integrated with the base 10 via shafts 6 and 7. As shown in FIG. 4, rollers 18 and 19 are attached to the base 10, and rollers 18 and 19 are interposed between the chamfered portion 53 at the end of the rectangular steel pipe 50 and the base 10. There is.

  As shown in FIG. 3, a motor 30 as a drive source of the cutting blade 20 is attached to the base 10 via a motor base 33. Reference numeral 32 is a power cord. In FIG. 2, reference numeral 31 is a rotating shaft of the motor 30 shown in FIG. The cutting blade 20 is attached to the rotary shaft 31, and the cutting blade 20 is attached to the base 10 via a motor 30.

  In FIG. 2, the cutting blade 20 is a substantially circular rotating body 21 to which cutting tips 22 are radially fixed, the cutting tip 22 rotates integrally with the rotating body 21, and the tip of the cutting tip 22 is a rectangular steel pipe 50. The surface of is cut into a flat shape. As will be described later in detail, when the welding bead cutting device 1 is horizontally moved in the state where the cutting blade 20 is rotated from the state of FIG. 2 (X direction), the cutting blade 20 is also horizontally moved together with the cutting operation, and cutting is performed. The welding bead 51 is cut by the tip 22.

  When the welding bead cutting device 1 shown in FIG. 2 is attached to the rectangular steel pipe 50, the horizontal guide 45 is placed on the rectangular steel pipe 50. As shown in FIGS. 3 and 4, the horizontal guide 45 extends over substantially the entire width of one side of the rectangular steel pipe 50. As shown in FIG. 2, one side of the rectangular steel pipe 50 is sandwiched between the rollers 2 and 3 and the roller 12 (moving body) integrated with the support body 11 via the horizontal guide 44.

  In FIG. 2, for convenience of illustration, the horizontal guide 44 near the roller 12 is shown in a sectional state. A groove 45 is formed in the horizontal guide 45, and a part of the roller 12 is inserted in the groove 45. FIG. 5 shows a sectional view taken along the line AA in FIG. The roller 12 is supported by a bracket 48 via a rotating shaft 47. The roller 12 is in contact with the bottom surface of the groove 45 of the horizontal guide 44. There is a slight gap between the side surface of the roller 12 and the groove 45, and the roller 12 can move in the longitudinal direction of the horizontal guide 44 (X direction in FIG. 2) while rotating on the bottom surface of the groove 45.

  In FIG. 2, the bracket 48 is fixed to the adjusting body 49. The adjustment body 49 is screwed with a bolt 13 that inserts the support body 11. For convenience of illustration, in FIG. 2, the upper end portion of the support 11 is shown in a sectional state. By rotating the bolt 13, the extension length of the bolt 13 from the support 11 changes, so the height h of the upper end of the support 11 from the rectangular steel pipe 50 also changes. As a result, the vertical position (height direction) of the base 10 integrated with the support 11 can be adjusted, and at the same time, the vertical position of the cutting blade 20 integrated with the base 10 can also be adjusted.

  More specifically, in FIG. 2, when the roller 12 is on the bottom surface of the groove 45 of the horizontal guide 44 and the bolt 13 is rotated so that the height h of the support 11 is increased, the base 10 is moved. Ascending, as shown in FIG. 2, the rollers 2, 3 and the cutting blade 20 come into contact with the inner peripheral surface of the rectangular steel pipe 50, and the cutting blade 20 is positioned. Further, when the bolt 13 is rotated, the cutting blade 20 presses the inner peripheral surface of the rectangular steel pipe 50, and the pressure contact state between the cutting blade 20 and the inner peripheral surface of the rectangular steel pipe 50 can be adjusted.

  At the time of working with the weld bead cutting device 1, in FIG. 2, the weld bead cutting device 1 is moved in the horizontal direction (X direction). In the present embodiment, the roller 12 rolls on the bottom surface of the groove 45 of the horizontal guide 44, and the entire apparatus moves. Therefore, if the horizontal guide 44 is placed horizontally on the rectangular steel pipe 50 in advance, the base 10 The cutting blade 20 will also move horizontally together with this. As a result, as will be described later in detail, even if the rectangular steel pipe 50 is deformed, the welding bead 51 and its vicinity can be cut without excess or deficiency.

  The work performed by the welding bead cutting device 1 will be described below with reference to FIGS. 6 to 8. FIG. 6A shows a state in which the welding bead cutting device 1 is attached to the square steel pipe 50. In the state shown in this figure, the cutting blade 20 is located away from the welding bead 51 when the welding bead cutting device 1 is mounted.

  In this state, the operator activates the motor 30 (see FIG. 3) to rotate the cutting blade 20. Subsequently, the operator holds the welding bead cutting device 1 and horizontally moves it while pushing the welding bead cutting device 1 in the horizontal direction (X direction). During the horizontal movement, the operator only has to hold, for example, the support 11 or a part of the base 10 of the welding bead cutting device 1. Further, the welding bead cutting device 1 may be provided with a handle for exclusive use for gripping during horizontal movement.

  During the horizontal movement of the welding bead cutting device 1, the cutting blade 20 rotates while being in contact with the inner peripheral surface of the rectangular steel pipe 50. Therefore, of the inner peripheral surface of the rectangular steel pipe 50, the passage portion of the cutting blade 20 is cut. FIG. 6B shows a state when the work by the welding bead cutting device 1 is completed. In this state, the welding bead 51 of the rectangular steel pipe 50 shown in FIG. 6A is cut and removed by the cutting blade 20.

  The removal of the welding bead 51 will be described more specifically with reference to FIGS. 7 and 8. FIG. 7 shows a state before the welding bead 51 is removed. The state of this figure is the same as that of FIG. 6 (a), and shows the state in which the welding bead cutting device 1 is attached to the rectangular steel pipe 50. As described above, the square steel pipe 50 is formed by press-forming a steel material and the joints are joined by welding, and the convex weld beads 51 are formed at the joints of the square steel pipe 50. In addition, in one side of the rectangular steel pipe 50 in which the beads 51 are formed, a curved portion 56 curved inward may be formed in the vicinity of the central portion, and in the vicinity of the weld bead 51, the curved portion 56 swells from the curved portion 56. A bulge portion 52 is formed.

  On the other hand, a flat surface portion 57 is left in the vicinity of both end portions of one side of the rectangular steel pipe 50 in which the curved portion 56 is formed. Since both ends of the horizontal guide 44 are placed on the flat surface portion 57, the horizontal guide 44 is maintained in a horizontal state, and a gap 58 is formed between the bottom portion of the horizontal guide 44 and the rectangular steel pipe 50. There is. For convenience of illustration, the bending of the bending portion 56 is exaggeratedly illustrated, and thus the gap 58 is also exaggeratedly illustrated.

  The cutting tip 22 of the cutting blade 20 has a width (for example, about 2 cm) at the tip of the cutting edge in the direction of the rotation axis 31. Therefore, when the rotating cutting blade 20 is moved horizontally from the state of FIG. 7 (X Direction), the inner peripheral surface of the rectangular steel pipe 50 is cut into a rectangular shape (see B portion in FIG. 9). Further, as described above, the horizontal guide 44 is kept in a horizontal state, and the entire device moves while the roller 12 rolls on the bottom surface of the groove 45 of the horizontal guide 44, so that the cutting blade is integrated with the base 10. 20 moves horizontally and the cutting surface becomes a horizontal surface.

  FIG. 8 shows a state in which the horizontal movement of the cutting blade 20 is completed. In this state, since the rectangular steel pipe 50 is cut so that the curved portion 56 becomes a horizontal plane, the welding bead 51 and the bulge portion 52 are also cut and removed.

  FIG. 9 shows a perspective view of the rectangular steel pipe 50 in a state where the work by the welding bead cutting device 1 is finished. The end portion of the inner peripheral surface of the square steel pipe 50 is cut into a rectangular shape (B portion), the end portion side of the square steel pipe 50 is removed from the weld bead 51, and the removed portion is a horizontal plane as described above, The inner peripheral surface on the end side of the rectangular steel pipe 50 is kept flat over the entire circumference, and the backing plate 54 shown in FIG. 15 can be fitted comfortably along the inner peripheral surface of the rectangular steel pipe 50. Becomes

  The weld bead cutting device 1 according to the present embodiment is mainly composed of the base 10 to which the horizontal guide 44 and accessory parts such as the cutting blade 20 are attached, so that a large-scale device or a complicated device is not required. In addition, the structure is simple, and the size and weight can be reduced. For this reason, it is easy to carry, the work of attaching / detaching to / from the rectangular steel pipe 50 is facilitated, and the handling at the time of work is facilitated, so that the work load is reduced.

  Further, as described above, even if the rectangular steel pipe 50 is deformed, the roller 12 rolls on the bottom surface of the groove 45 of the horizontal guide 44 kept in a horizontal state, and the entire device moves, so that it is integrated with the base 10. The cutting blade 20 moves horizontally and the cutting surface becomes a horizontal surface. Therefore, the inner peripheral surface of the rectangular steel pipe 50 is cut by the cutting blade 20 without excess or deficiency, and it is possible to prevent excessive cutting or uncut residue.

  Further, the square steel pipe 50 is usually provided with a bead 51 on the upper side as shown in FIG. 1, and in order to remove the bead 5 manually with a tool such as a grinder, the bead 51 is placed at the bottom. It was necessary to reverse the square steel pipe 50 so as to come to the side, but since the welding bead cutting device 1 can work with the bead 51 on the upper side as described above, the work of reversing the square steel pipe 50 is possible. Can be omitted.

  Hereinafter, the adjustment mechanism of the welding bead cutting device 1 will be described mainly with reference to FIG. 10. FIG. 10 shows a front view of the welding bead cutting device 1. The welding bead cutting device 1 can adjust the positional relationship between the rollers 2 and 3 and the cutting blade 20 by adjusting the positional relationship between the base 10 and the motor 30.

  The motor base 33 shown in FIG. 3 is fixed to the base 10 by the bolts 26, 27, and 28 shown in FIG. 10. As shown in FIG. It is attached to the back side. In FIG. 10, the bolt 27 is inserted through the elongated hole 16, and the bolt 28 is inserted through the elongated hole 17. Therefore, when the tightening positions of the bolts 27 and 28 in the elongated holes 16 and 17 are changed, the fixing position of the motor base 33 to the base 10 is changed from the bolt 26 as a starting point, and at the same time, the base of the cutting blade 20 integrated with the motor 30 is changed. The mounting position for the table 10 will change.

  When the mounting position of the cutting blade 20 on the base 10 changes, the positional relationship between the cutting blade 20 and the rollers 2 and 3 also changes, and the positioning position of the cutting blade 20 when the welding bead cutting device 1 is attached to the rectangular steel pipe 50 is also changed. Instead, it becomes possible to adjust the positioning position of the cutting blade 20. By this adjustment, the cutting depth can be adjusted. Specifically, if it is desired to perform deeper cutting after the first cutting, if the upper end of the cutting blade 20 is adjusted to be above the upper ends of the rollers 2 and 3, the first cutting is performed in the second cutting. It becomes possible to cut deeper the cutting part of.

  Further, in this embodiment, it is possible to adjust the distance between the rollers 2 and 3. In FIG. 6 (b) showing the state at the end of work by the weld bead cutting device 1, a certain amount of space is provided between the standing portion 4 supporting the roller 2 and the inner wall surface on the left side of the square steel pipe 50 in the horizontal direction. The distance is kept. On the other hand, if the horizontal width of the rectangular steel pipe 50 is small, the standing portion 4 and the left inner wall surface of the rectangular steel pipe 50 interfere with each other before the welding bead 51 is cut by the cutting blade 20, and the work is interrupted. .

  In the present embodiment, the horizontal arrangement position of the roller 2 is adjustable so that the welding bead 51 can be cut even for a rectangular steel pipe 50 having a small width. Specifically, in FIG. 10, the standing portion 4 that supports the roller 2 has the extending portions 14 and 15, and the bolts 23, 24, and 25 inserted through these portions are fastened to the base 10. The upright portion 4 is attached to the base 10.

  On the other hand, the base 10 is provided with holes 34, 35, 36, 37, etc. in the horizontal direction so that the holes for fastening the bolts 23, 24, 25 can be changed. It is possible to adjust the mounting position to adjust the distance between the rollers 2 and 3. When the welding bead cutting device 1 is mounted on the rectangular steel pipe 50 having a small width, the standing portion 4 may be attached to the roller 3 side before the welding bead 51 is cut by the cutting blade 20. It is possible to prevent the interference with the inner wall surface on the left side of the rectangular steel pipe 50. Further, since the distance between the rollers 2 and 3 can be adjusted, the distance between the rollers 2 and 3 can be set according to the cutting length.

  Further, in the present embodiment, the mounting position of the support 11 can be adjusted so that the welding bead cutting device 1 can be stably installed on the rectangular steel pipe 50. In FIG. 3, the support 11 is attached to the base 10 by tightening the bolts 40 and 41 through which the support 11 is inserted into the base 10. The base 10 is provided with holes 42, 43, etc. in the horizontal direction so that the holes for inserting the bolts 40, 41 can be changed, and the horizontal mounting position of the support 11 can be adjusted. It has become.

  Although one embodiment of the present invention has been described above, these are merely examples, and the present invention is not limited to the above-described embodiment. The structure of the guide 44, the engagement structure between the guide 44 and the moving body (the roller 12 in FIG. 2), Structure of support 11, rollers 2 and 3, support structure thereof, mounting structure of motor 20, structure of cutting blade 20, position adjusting mechanism of cutting blade 20, position adjusting mechanism of roller 2, position adjusting mechanism of support 11 and the like May have another structure as long as the same effect and function are realized.

  For example, the guide 44 may have any structure as long as the moving body engaged with the guide 44 can move horizontally, and is not limited to the one in which the groove 45 and the roller 12 are engaged as shown in FIG. The slider having the groove to be engaged with the rail may be engaged (see the embodiment of FIGS. 11 to 14). Further, the rollers 2 and 3 may be sliding bodies other than the rollers. Further, although the horizontal guide 44 is described as an independent component separate from the base 10 in the above-described embodiment, it may be integrated with the base 10.

  Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 11 to 14. 11 shows a side view of the welding bead cutting device 59, and FIG. 12 shows a plan view. In each drawing, the welding bead cutting device 59 is attached to the rectangular steel pipe 50. Also in this embodiment, the structures of the rectangular steel pipe 50, the motor 62, the roller 63, and the cutting blade 64 are the same as those in the above-described embodiment.

  In FIG. 11, the welding bead cutting device 59 has a base 60 and a horizontal guide 61 as main parts, and a motor 62, a roller 63 and a cutting blade 64 are attached to the base 60 via a support body 76. . In the state of FIG. 11, the roller 63 and the cutting blade 64 driven by the motor 62 are in contact with the inner peripheral surface of the rectangular steel pipe 50.

  As shown in FIG. 11, the horizontal guide 61 is placed on the rectangular steel pipe 50, and as shown in FIG. 12, the horizontal guide 61 is arranged in the horizontal direction (X direction) on one side of the rectangular steel pipe 50. It has been extended. The ball screw 65 included in the horizontal guide 61 is screwed with the support body 66 (see FIG. 13). As will be described later in detail, by rotating the handle 67, the ball screw 65 rotates, and along with this, the base 60 moves in the horizontal direction (X direction).

  According to FIG. 13, which is a cross-sectional view taken along the line DD in FIG. 12, a pair of rails 71 are arranged on a base 70 included in the guide 61, and a pair of rails 71 and a slider 72 (moving body) provided on the support 66 are provided. Are engaged. As a result, during the horizontal movement of the base 60, the base 60 is guided by the rails 71, the cutting blade 64 (see FIG. 11) horizontally moves integrally with the base 60, and the cutting surface becomes a horizontal plane. Therefore, also in the weld bead cutting device 60, as in the weld bead cutting device 1 shown in FIG. Can be prevented.

  In FIG. 11, the cutting blade 64 enables position adjustment in the front-back direction (Y direction) and position adjustment in the height direction (Z direction). Since the ball screw (not shown) is rotated by the rotation of the handle 68, the base 60 moves in the front-rear direction (Y direction). More specifically, in FIG. 13, the rail 73 is fixed to the base 60, and the rail 73 and the slider 74 provided on the support body 66 are engaged with each other. As a result, while the base 60 is moving back and forth, the rails 73 of the base 60 are guided by the sliders 74, and the cutting blade 64 also moves back and forth integrally with the base 60.

  Further, the ball screw 75 is rotated by the rotation of the handle 69 shown in FIG. 11, and the support body 76 is moved in the vertical direction (Z direction) integrally with the ball screw 75. More specifically, according to FIG. 14 which is a view of arrow C in FIG. 11, the slider 77 is fixed to the support body 76, and the slider 77 and the rail 78 provided on the base 60 are engaged with each other. As a result, during the vertical movement of the support body 76, the support body 76 is guided by the rails 78, and the cutting blade 64 moves up and down integrally with the support body 76. According to the configuration in which the positions of the cutting blades 64 can be adjusted, the degree of freedom in setting positions of the cutting blades is increased, and more accurate cutting can be performed.

  Although the other embodiments of the present invention have been described above, these are merely examples, and other structures that are appropriately modified may be used as long as they achieve the same effects and functions, and are appropriately simplified. May be For example, in FIG. 12, the ball screw 65 provided in the horizontal guide 61 may be omitted, and the operator may grasp a part of the base 60 and move the base 60 horizontally.

1,59 Weld bead cutting device 2,3,63 Roller 10,60 Base 11,66,76 Support 12 Roller (moving body)
20, 64 Cutting blade 22 Cutting tip 30, 62 Motor 44, 61 Horizontal guide 50 Rectangular steel pipe 51 Weld bead 72 Slider (moving body)

Claims (3)

A welding bead cutting device for cutting a welding bead of a butt weld portion of a rectangular steel pipe,
A horizontal guide placed on the rectangular steel pipe,
A movable body that can move along the horizontal guide,
A base that moves integrally with the moving body,
A cutting blade attached to the base and rotationally driven to cut the welding bead,
With one side of the rectangular steel pipe sandwiched between the horizontal guide and the cutting blade, while moving the movable body and the base integrated with the horizontal guide along the horizontal guide, the welding bead with the cutting blade. Weld bead cutting device, which is characterized by cutting.   The welding bead cutting device according to claim 1, wherein the cutting blade is vertically position-adjustable.   The welding bead cutting device according to claim 1 or 2, wherein the base is positionally adjustable in the front-rear direction.

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